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JY-MO Engineering Co.,Ltd

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Reasons for the rust of injection moulds and solutions
Apr 16, 2018

Phenomenon of mold rust is a relatively easy to see, which not only affects the appearance of the mould, and will directly affect the overall quality of the mould, so the mold rust is the problem that nots allow to ignore, the following is the analysis of the causes and measures, for your reference.

The cause of rust is 1. 2. Return of mold. 3. Hand sweat.

Related analysis of mold rust;

1. The product (gas, residue) of the formed material decomposition is the most common corrosion of the mold. In order to prevent the rust of the mold, the most widely used is the chromium plating treatment of the mold cavity, but the chromium plating treatment can not solve the problem adequately, because the parts of the product that are deep in the sales hole are also corroded. And these are places where they can't be plated.

2. When the mold is cooled to below the moisture return point, moisture in the air will be generated by moisture on the surface of the mold, and it will rust.

Solve the problem of mold rust;

1. Short-term; Lightly rub the surface of the cavity with a cloth. The molding material is fully dry, and the temperature of the material is lowered to prevent the material from decomposing. When the molding is temporarily stopped, spray anti-rust agent on the mold cavity and then close the mold.

2. Long term; Turn the product material into a material that breaks the mold without corroding it. Easily decomposed materials include PVC, POM, EVA, PC and foaming materials. Because the decomposition products have a corrosive effect on the molds, the plastic raw materials should not be changed, and the die should be treated with chromium plating. Apply a layer of butter to the external and active parts of the mould when the mold is stopped for a long time.

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